Decker was gunned down in Cold Spring Thursday night after responding to a call of a suicidal man. Investigators say he was ambushed.

"I just put it on Facebook and a lot of people responded," said Lisa Stukey who organized the vigil. "(It's) a goodbye and a thank you to him."

The vigil was in the parking lot at Wenner Funeral home in Cold Spring, not far from where police say Decker was killed. The crowd sang hymns and heard stories about Decker from people who knew him, including his boss Cold Spring-Richmond's police chief.

"I just thought it would be important to do something for Officer Decker," said Stukey.

Stukey met Decker when she called 911 last year.

"It was a false alarm, thank goodness. But he made me feel safe; he didn't make me feel silly," she said.

Glendice Cavalier lives just outside of Cold Spring but had to be there to show her support. "This was a horrible thing to happen and everyone is feeling the same way," she said.

They described it as someone punching you in the gut with no warning at all. That's what Mark Hennen feels like. "He's a hero to us to. We work with him hand and hand," said Hennen.

Hennen was one of a handful of neighboring Richmond Fire Fighters who showed Monday night. He knew Decker not just as an officer, but a friend.

"I don't know, it's just really uneasy," he said of himself and the town. "They don't know how to feel like about something this. It hits everybody."

"He has a family, 4 little kids and a wife. What a sad thing for them," added Cavalier.

Those in attendance say some of Decker's siblings showed up, along with dozens of brothers in blue from small town deputies to big city cops. All of them looked as if they were in a daze, knowing one of this small town's bright lights has gone out.

"It has hit us all really hard whether we knew him or not," said Cavalier.

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